Safety razor



Nov. 4, 1958 o. EWILLHELM 2,858,608

' SAFETY RAZOR Filed July 20, '1955 INVENTOR I OSCAR F. WILLHELM .m/ BY my fl ATTORNEY United States Patent SAFETY RAZOR Oscar F. Willhelrn, New London, Conn., assignor to Durham-Enders Razor Corporation, a corporation of New York Application July 20, 1955, Serial No. 523,278

2 Claims. (Cl. 30-55) This invention relates to a hair trimmer and/or razor, particularly a type known in the trade as the Durham Duplex. In razors of this type, a thin replaceable razor blade is positioned between a supporting member and a clamping member. The supporting member and the clamping member are held together by means which pass through the perforation in the blade and slidably engage the members.

It is one of the objects of the present invention to provide a simple locking structure for positively securing the members against sliding disengagement.

It is a further object of the invention to provide a lock to prevent accidental displacement between the supporting and clamping members.

The novel features which I believe to be characteristic of my invention are set forth with particularity in the appended claims. My invention itself, however, both as to its organization and method of operation may be understood by reference to the following description taken in connection with the accompanying drawings, in which:

Fig. 1 is a plan view illustrating the assembled hair shaper;

Fig. 2 is a plan view of the guard and lock plate;

Fig. 3 is a side elevation of the same taken on line 33 of Fig. 2;

Fig. 4 is a side elevation of the holder bar; and

Fig. 5 is an enlarged detailed side elevation illustrating the key lock of the improved guard and lock plate.

The hair cutter has a handle 12 in which is pivotally secured the blade holder 14. Blade holder 14 has a shaped backing portion 16 having elongated slots 18 and 20 and recessed portions 22 and 24. A guard and lock plate 26 carries a pair of lug clips 28, 30 which pass through central openings in the blade and through the slots 18 and 20, respectively, to slidably engage the recesses 22, 24. Lug clips 28, 30 and recesses 22, 24

Patented Nov. 4-, i858 ice may be further provided with complementary protuberances and indentations 32 and 34, respectively.

At the inner end of lock guard 26 is a key extension 36 having an integral bent stud 37. As clips 28, 30 of lock plate 26 are slidably engaged in the recesses 22 and 24, bent stud or hook 37 of the key 36 rides upward on the cam surface 38 of blade holder 14, and then drops into the groove 40 so that the tip 37 of hook 36 is locked to prevent disengagement of the lock plate.

Plate 26 has an integral thumb grip 42 for flexing plate 26 and extension 36 to disengage bent stud 37 from the groove 40. Because of the curve of thumb grip 42 it is possible when holding the assembled device in the right hand to depress the grip 42 so that stud 37 is disengaged and simultaneously lock plate 26 is urged forward for sliding disengagement of lugs 28 and 30 from the recesses 22 and 24 and out of slots 18 and 20, respectively.

With reference to Fig. 5, it is quite evident that when the stud 37 is in the groove 40 it is impossible to disengage the device without flexion of plate 26.

The corrugations 44 of member 14 facilitate gripping the razor or hair shaper 10. The dentate portion 46 guardedly exposes the blade 48 and serves to guide hairs into contact with its cutting edge.

I claim:

1. In a device for holding a razor blade, a backing member, a lock plate member, said lock plate member and said backing member each having means for sliding engagement between said members to support a razor blade therebetween, the. surface of one of said members facing the other of said members having an indentation formed therein, a bent stud on the other of said members engageable with said indentation when said members are slidably engaged, said stud being resiliently urged into said indentation and disengaged therefrom by movement away from said one of said members to permit sliding disengagement of said members.

2. A device substantially as set forth in claim 1, further characterized by a cam slope formed on said one of said members sloping toward said indentation in the direction of sliding engagement of said members to cam said stud against its resilient urging so it may engage said indentation upon sliding engagement of said members.

References Cited in the file of this patent UNITED STATES PATENTS 985,759 Kessler Feb. 28, 1911 1,012,728 Sheehan Dec. 26, 1911 1,139,796 Parker May 18, 1915 1,791,855 Taylor Feb. 10, 1931 

